Custom 16.5m Expedition Yacht SANTOSA

SANTOSA is a custom-built expedition yacht, built in the UK and commissioned in 2017 her design is a development of the original Bruce Roberts 54’ ketch. The owner’s philosophy throughout the build process was to create a beautiful-looking yacht, finished to a high standard while being strong enough to operate commercially in the harshest environments while keeping her crew safe and comfortable. Below decks the layout offers 3 double cabins, two with en-suite heads and a further two pullman berths. A spacious galley with adjacent dinette located below deck level leave the spacious deck saloon clear for the internal helms station and saloon seating.

Designed and constructed to comply with CAT 0 commercial coding requirements, she has previously operated commercially under both CAT 0 and CAT 2 UK coding. Now offered for sale as her owners look to shift their focus to new projects; her extensive inventory highlights include:

Rolled steel plate construction, round bilge
Awlgrip two pack paint system to finish hull and superstructure
Keel divided into watertight compartments and filled with lead ballast
Watertight bulkheads internally to comply with CAT 0 coding requirements
Perkins M135 marine diesel engine, 135hp @ 2,600rpm
MaxProp 24”, 4-blade, bronze feathering propeller
Hy-drive, hydraulic dual station steering system, switched feedback/non feedback for external helm
Vetus H160, 9.5kW, hydraulic bow thruster
Mastervolt Whisper 10 Ultra generator, 10kW @ 1500RPM
Mastervolt battery chargers and invertor
Cathelco Seafresh H204 watermaker
Raymarine Axiom 2Pro chart plotters with digital radar scanners
Raymarine AIS700 Transciever (2026)
Icom IC-M603 with Icom HM-162E control mic in cockpit
Icom IC-M801E MF/HF marine transceiver, backstay isolated for use as antenna
Iridium Extreme sat phone handset
Starlink satellite internet system
Force 10 gas galley range cooker
Independent fridge and freezer, both built in
Eberspacher Hydronic 10 diesel-fired, wet heating system
Dometic Air Conditioning System
Sanmarin 35 electric flushing marine toilets in all heads
2x Maxwell 3500 hydraulic anchor windlasses
Avon 310 RIB with GRP hull, fitted with lifting strops
Yamaha 15hp, 2-stroke, serviced January 2026 (new in 2022)

Currently cruising in northern Norway with a trip to Svalbard planned during the trip this magnificent yacht will be available for viewings strictly by prior arrangement during her trip.

CONSTRUCTION

Classification:
RCD Ocean A classification
Built to comply with MCA CAT O commercial coding
History of commercial operations under both CAT 0 and CAT 2

Hull Construction:
Rolled steel plate construction, round bilge
Hull plating of 5mm & 6mm steel plate
12mm mild steel collision plate to forward keel
Structural frames and stringers in 8 and 10mm steel plate
Strengthened bar on bow and bow-thruster tunnel
Toerails in 316 stainless steel
Class 1 spray foam insulation (50mm) with asbeto-cote to encapsulate foam
Hull professionally painted by Blue Fin Yachts ltd
Awlgrip two pack paint system to finish topsides, Awlgrip G-Line, Oyster White and Flag Blue
Internal hull garnet blasted to SA3 and finished with International 750
Awlgrip Hullguard antifouling applied April 2026

Deck & Superstructure Construction:
4mm steel plate construction
Grabrails and supports in 316 stainless steel
2G synthetic decking to finish foredeck, side decks, aft deck and cockpit
Class 1 spray foam insulation (50mm) with asbeto-cote to encapsulate foam
Awlgrip two pack paint system to finish superstructure, Awlgrip G-Line, Oyster White and Flag Blue
Coachroof windows manufactured by Gebo with alloy frames and 10mm toughened glass
Gebo Portlights and deck hatches

Keel:
Rolled plate steel formed as part of hull
Watertight compartments within keel sections all fitted with stainless access plates.
Compartments divided for 5500kg of lead ingots and Dinitrol filled

Rudder:
Semi-balanced rudder
4mm steel plate construction
Full-depth stainless steel rudder stock
Self-aligning rudder bearings.

MACHINERY
Engine Space:
Accessed by a hinged sole hatch in within saloon sole
Compartments fully lined with Halyard Marine, Maritex 45mm sound insulation
Engine compartment blower with isolation switch for operation in colder climates
Full LED lighting throughout engine space

Engine & gearbox:
Perkins M135 marine diesel engine
135hp @ 2,600rpm
6 cylinder, inline, 4 stroke, naturally aspirated, indirectly cooled
Newage PRM 500 hydraulic, reversing marine gearbox
Engine driven hydraulic pump for powering auxiliary equipment
Dedicated Racor 500FG primary fuel filter and water separator
Dual control stations with twin lever controls
Dual engine dash panels with RPM, water temp, oil pressure and battery voltage
Maintenance & Performance:
Recorded engine running hours approximately 1,800hrs
Engine last serviced October 2025
Cruising speed, 7-7.5kts @ 1700rpm, 10-11ltrs per hour
Maximum speed, 9-10kts
Maximum tankage range at cruising speed 1,200nm

Propulsion & Steering:
50mm stainless steel propshaft
Halyard Aquadrive thrust bearing
Tides Marine SureSeal shaft seal
Gator rope cutter
MaxProp 24”, 4-blade, bronze feathering propeller
Hy-drive, hydraulic dual station steering system, switched feedback/non feedback for external helm
Jefa stainless steel steering wheels with leather covers
Emergency Tiller

Autopilot:
Raymarine Autopilot system
2x Raymarine P70 control heads
Raymarine SPX course computer
Raymarine hydraulic drive pump

Bow Thruster:
Vetus H160, 9.5kW bow thruster
Vetus mounting re-finished with hard anodising to prevent corrosion issues
Hydraulic drive, from pump on main engine
Tunnel mounted
Toggle type controller at external helm station

Generator:
Mastervolt Whisper 10 Ultra
10kW @ 1500RPM
Misubushi S3L2, 3 cylinder diesel engine
Remote control start stop panel
Dedicated Racor 500FG primary fuel filter and water seperator
Last serviced October 2025
Recorded running hours approximately 1000hrs

ELECTRICAL SYSTEMS

Voltage systems:
230VAC shore power / generator system
24VDC onboard power system

Shore Power:
Extension cable to connect to shore supply
Single deck connection through Mastervolt Mass GI3.5 16amp isolation transformer
Mastervolt Mass power management system, automatically switching between shore power, generator and inverter supplies for 230VAC
RCD protected system
3 individual ring mains, UK 3 pin sockets, dedicated supply to socket in lazarette locker, water heater

Battery Banks:
Domestic Batteries – 6x 12VDC, 270Ah, Mastervolt AGM batteries (2024) producing 810Ah @ 24VDC
Engine Battery – 2x 12VDC, 70Ah, Mastervolt Gel batteries, linked in series to provide 24VDC
Generator Battery – 1x 12VDC, 70Ah, Mastervolt AGM battery (2024)
Emergency coupler to link Domestic and Engine batteries for engine starting

Charging:
Domestic Battery Charger - Mastervolt Mass 24/100 battery charger, 230VAC-24VDC, 100amp

Alternator:
Alpha Pro alternator charge regulator

Inverter:
Mastervolt Mass Sine Wave Inverter
24VDC – 230VAC, 2500w

Other Electrical:
Wiring in place for installation of towed generator

PLUMBING & GAS SYSTEMS

Fresh Water:
Full pressurised hot and cold water system
Swan head mixer tap in galley with extendable spray head
Filtered drinking water tap in galley
Quooker instant boiling water tap in galley
Mixer taps in all three heads
Dedicated shower head fitting in all three heads
Transom shower with hot and cold water
Hot water heated by engine cooling water, Eberspacher wet heating system or 1kw, 230VAC immersion heater

Watermaker:
Cathelco Seafresh H204 watermaker
230VAC, 1.5kw, powered from generator
72ltrs per hour

Grey Water:
Two independent tanks located fore and aft for all grey water outlets
Automatic/Manually switch electric overboard discharge
Deck pump out and flush fittings

Black Water:
All toilets can discharge directly overboard or to holding tanks
Two independent tanks located fore and aft for all black water outlets
Macerator type pumped overboard discharge
Deck pump out and flush fittings

Bilge Pumps:
Manual Bilge Pump
Electric Bilge Pump – 4x 3000GPH pumps dedicated pump for each bilge compartment with Rule air switches and wavestream oil separator on each discharge
Engine Driven Bilge Pump – Drive clutch, 195ltrs per minute, suction manifold with motorised valves to select bilge compartment
Anchor Locker Sump Pump – 1x Rule 800GPH pump
Lazarette Sump Pump - 1x Rule 800GPH pump

Deck / Anchor Wash:
Saltwater deck and anchor wash system
Dedicated pressure pump with hose and spray nozzle

Gas System:
Nereus gas control panel in galley
2x 6kg propane bottles
Self-draining gas locker housing regulator and manifold
Gas supply and fittings for a rail-mounted gas BBQ

TANKAGE

Fuel:
Insulated, aluminium tank construction, fully isolated from the hull.
Two independent tanks with a balance pipe
4 inspection hatches in each tank for full tank access
Fillers for tanks on port and starboard side decks
Approximate total tank capacity 1590ltrs

Fresh Water:
Tek-Tank custom-made nylon tanks
4 tanks in total
Tanks interconnected to act as a single tank
Inspection hatches to access each tank
Fillers for tanks on port and starboard side decks
Approximate total tank capacity 600ltrs

Grey Water Tank:
Two independent tanks
Tek-Tank custom-made nylon tanks
Aft tank approximate capacity 119ltrs
Forward tank approximate capacity 114ltrs
Total approximate capacity 233ltrs
Black Water Tank:
Two independent tanks
Tek-Tank custom-made nylon tanks
Aft tank approximate capacity 115ltrs
Forward tank approximate capacity 114ltrs
Total approximate capacity 229ltrs
Tank Monitoring:
Fuel Tanks – Sight gauges at internal helm station for both tanks
Freshwater Tanks - Sight gauges at internal helm station for both tanks
Grey Water Tanks – Level sensors and alarms with automatic or manual operation
Black Water Tanks – Level sensors and alarms with automatic or manual operation

NAVIGATION & COMMUNICATION EQUIPMENT

On Deck:
Chartplotter / Radar – Raymarine Axiom 2Pro
Radar Scanner – Raymarine RD418HD
Depth – Raymarine i50
Speed/Log – Raymarine i50
Wind – 2x Raymarine ST60
Magnetic Compass

At Chart Table:
Chartplotter / Radar – Raymarine Axiom RMV
Depth – Raymarine i50
Speed/Log – Raymarine i50
Wind – Raymarine ST60

Communications Equipment:
DSC VHF – Icom IC-M603 with Icom HM-162E control mic in cockpit
AIS – Raymarine AIS700 transceiver (2026)
HF Marine Radio – Icom IC-M801E MF/HF marine transceiver, backstay isolated for use as antenna
Handheld VHF – 1x Icom IC-M25 1x Icom IC-M93D
Sat Phone – Iridium Extreme handset
Emergency VHF aerial
DOMESTIC EQUIPMENT

Galley:
Galley Stove – Force 10 galley range, 4 burner, oven and grill, gimbal mounted
Fridge – 80ltr Built-in, top-loading, Dometic CU-84 compressor and chiller plate, air cooled with ‘K’ thermocouple for digital temperature display
Freezer – 80ltr Built-in, top-loading, Dometic CU-97 compressor and chiller plate, water cooled with ‘K’ thermocouple for digital temperature display
Microwave – Panasonic, 230VAC, 800w
Quooker instant boiling water tap
Mixer tap with extendable showerhead
Double stainless steel sinks

Heads:
Toilets – 3x Sanmarin 35 electric flushing marine toilets with switchable fresh or salt water flushing
Heated towel rails in all 3 heads compartments
Wash hand basin with mixer tap
Shower stall with dedicated shower fitting in all 3 heads compartments

Heating:
Eberspacher Hydronic 10 diesel-fired, wet heating system
Thermostatically controlled blown air matrix boxes throughout interior
Heated towel rails in all 3 heads compartment
Dedicated coil in calorifier for heater to provide heating to the hot water

Air Conditioning:
Dometic Air Conditioning System
Independent Dometic 230VAC VTD8 8000 BTU/h units for forward port cabin and pullman berth area (2024)
Shared Dometic 230VAC, 12000 BTU/H unit serving both aft cabins.
Controllers in all cabins
Piping, power supplies and ducting in place for additional unit to serve saloon if required.

Ventilation:
Dorade box ventilators on deck with directional cowl fittings
Adjustable internal control or closure system for dorade ventilators

Internal Lighting:
Deck head downlighter throughout interior with warm white LED bulbs
Red lighting in saloon, dinette and galley
Reading lights in saloon, dinette and cabins
Chart table working light, white/red
Red/White LED lighting in lazarette

Entertainment:
TV/DVD – Lina 24” Smart TV/DVD combi display
Fusion MS-IP600 head unit located in dinette
Fusion MS-WR600 wired head unit remote control station in cockpit
Speakers in dinette, saloon and cockpit with zoned control

ACCOMMODATION
Summary of Accommodation:
Workshop forward
Double cabin to port
Pullman berths to starboard side forward
Forward Heads
Dinette
Galley
Elevated deck saloon
Internal helm station
Port and starboard double aft cabins with en-suite heads

Accommodation Finish:
Internal layout by Mark Tucker of Design Unlimited
Internal joinery work built by Rookwood Joinery, Chichester
Internal joinery work finished through out in light American oak veneer
Soleboards in tradition teak and holly, 2mm veneer plywood.
GRP moulded shower stall units in all heads compartments.
Corrian worktop in galley
Corrian countertops in heads
Brushed stainless steel finish to deckhead above cooker and microwave in galley
Leather, ivory upholstery in saloon and dinette
Lee cloths for all bunks
Oceanair deck hatch sky screen/blackout/mosquito blinds for all deck hatches in cabins
Oceanair Skysol blinds for deckhouse porlights

DECK EQUIPMENT

Rig:
Deck stepped, masthead, cutter rigged ketch
Mast and spars of silver anodised alloy, double spreader main mast, single spreader mizzen mast
Stainless steel standing rigging with chromed bronze rigging screws
Seleden hydraulic roller reefing systems on forestay and inner forestay
Fredriksen/Ronstan mast track and cars for mainsail and mizzen
Navtec hydraulic vang for main boom
Midboom mainsheet mounted on coachroof forward of sprayhood
Block and tackle kicker for mizzen boom
Split backstay with Navtec hydraulic backstay tensioners port and starboard
Running check stays on main mast
Mast steps to masthead on both main and mizzen masts
Spinnaker pole, stowing on mast, additional 2nd spinnaker halyard.
Lines lead aft to cockpit for mainsail, mainsail reefing and cruising chute
Antal ball bearing footblocks for lines lead aft
Antal rope clutches for lines lead aft to cockpit
Lazyjacks for main and mizzen
Winches:
Primary Winches – 2x Andersen 68, two speed, self-tailing
Secondary Winches – 2x Andersen 52, two speed, self-tailing
Auxiulary Winches – 2x Andersen 40, two speed, self-tailing
Cockpit Halyard/Mainsheet Winches – 2x Andersen 46, electric, two speed manual, self-tailing

Sails:
White sails inspected and serviced in April 2026
Genoa – Spectra reinforced Dacron, high cut, roller reefing with foam luff and UV strip. Kemp Sails, 2016
Staysail - Spectra reinforced Dacron, high cut, roller reefing with foam luff and UV strip Kemp Sails, 2016
Mainsail – Spectra reinforced Dacron, fully battened (5 in total), slab reefing, 3 full reefs. Kemp Sails, 2016
Mizzen – Spectra reinforced Dacron, fully battened (4 in total), slab reefing, Kemp Sails, 2016
Cruising Chute – 1.5oz with snuffer, ral cut. Kemp Sails, 2016
Storm Jib - Hank on, fitting in place of staysail. Kemp Sails, 2016
Canvas Work:
Mainsail Cover – Stackpack type boom cover with lazyjacks
Mizzen Cover – Stackpack type boom cover with lazyjacks
Sprayhood – central screen section removable, on stainless steel frame
Bimini – Cover full cockpit, on stainless steel frame, removable
Pedestal Cover
Winch Covers

Anchoring & Mooring:
Bower Anchor #1 - 40kg Rocna anchor and 86mtr of 12mm chain
Bower Anchor #2 - 50kg Bruce anchor and 86mtr of 12mm chain
Kedge/Aft Anchor – Anchor with chain / warp rode can be used as kedge or with aft windlass.
Anchor Windlass #1 - Maxwell 3500 hydraulic windlass with remote control fob or switch control at helm pedestal
Anchor Windlass #2 - Maxwell 3500 hydraulic windlass with remote control fob or switch control at helm pedestal
Stern Windlass – Maxwell Liberty hydraulic capstan??? with remote control fob or switch control at helm pedestal
Anchor Warp – 2x 100m reels
Mooring Warps – Selection
Fenders - Selection

Deck Lighting:
Spreader-mounted deck lights
Forward-facing spotlights mounted within forward dorade boxes
Pulpit-mounted spotlight
Low-level courtesy lighting on all steps
Transom step red/blue courtesy lighting

Tender:
Tender – Avon 310 RIB with GRP hull, fitted with lifting strops
Outboard – Yamaha 15hp, 2-stroke, serviced January 2026 (new in 2022)
Davit – Transom-mounted Y-frame type davit lifting arm, raising and lowering on captive winch. Plug-in pendant controller

General:
Twin, self-launching, stainless steel anchor rollers on bow with mechanical clamps to secure anchors when stowed
Stainless steel pulpit rail
Toe rail mounted stainless steel stanchions with triple-tier guardwires
Guardwire boarding gates to port and starboard sides
Mooring cleats forward, midships and stern, port and starboard
Fairleads with rollers let into toe rails forward to port and starboard
Twin hydraulic windlasses mounted to port and starboard sides of inner forestay
Gebo deck hatch to access anchor locker space, forward of collision bulkhead
Dual dorade ventilator with stainless steel air scoops and stainless steel protection rails mounted to port and starboard at forward end of coachroof
Stainless steel grabrails outboard of coachroof to port and starboard sides forward
Twin deck hatches forward, opening into forward cabin and workshop space.
Dual dorade ventilators with stainless steel air scoops and stainless steel protection rails mounted to port and starboard sides, immediately aft of mast step
Stainless steel grabrails outboard of coachroof to port and starboard sides outboard of ventilators and hatches
Twin deck hatches forward of windscreen, opening into galley and dinette
Lines lead aft from main mast on port and starboard sides of central forward facing window
Mainsheet track mounted of deckhouse roof, immediately forward of sprayhood
Track and cars mounted on side decks for genoa and staysail sheets
Stepped side decks, immediate aft of boarding gate, elevated deck running aft to transom
Turning blocks for genoa and staysail sheets mounted on toerail outboard
Short section of deck extending aft of cockpit with mizzen mast step forward centrally
Deck hatches outboard of mast step to port and starboard, opening into aft cabins
Dorade ventilators with stainless steel air scoops and stainless steel protection rails mounted outboard on port and starboard quarters
Stainless steel pulpit rail wrapping around aft deck and across transom with G&T seats to port and starboard, transom boarding gate offset to port
Liferafts mounted on railing to port and starboard
Lazzarette accessed from either deck hatch on aft deck or the water-tight transom door
Ladder to climb down from deck level into lazarette with lazarette housing hydraulic power pack for davit, gas bottle storage, steering gear and heating system.
Sugar scoop style transom with bathing platform, davit assembly mount at forward end of platform centrally.
Ladder to access transom from deck level with additional clip-in swimming ladder mounted on transom
Transom shower with hot and cold fresh water
Danbuoys, horseshoe buoys mounted on port and starboard rails
Coaming wrapping around cockpit with winches mounted on coaming tops to port and starboard
Bench seating to port and starboard sides of cockpit
Winches mounted to port and starboard sides of companionway with rope clutches forward
Navigation instruments mounted on pods forward of coamings to port and starboard sides
Helm pedestal mounted at aft end of cockpit centrally, leather covered stainless steel wheel
Stainless steel grabrail rising above pedestal with nav pod housing Raymarine plotter and radar display
Autopilot control, bow thruster joystick, switch panel and VHF all mounted on pedestal

SAFTEY EQUIPMENT:

General note on safety equipment: Any safety equipment such as liferafts, Epirbs, fire extinguishers and flares etc. are usually personal to the current owner(s) and if being left on-board as part of the sale of a used vessel may require routine servicing, replacement, or changing to meet a new owners specific needs.

Navigation Lights:
Masthead Tri-colour
Masthead anchor light
Steaming light
Low-level navigation lights

Fire Fighting Equipment:
Seafire and deployment system for fuel valves and dampers
10kg auto fire extinguisher within engine room
1kg powder extinguisher to all cabins/galley
4kg powder extinguisher to saloon
Galley fire blanket
Forward deck-wash fire hose

Life saving:
Liferaft - 2 x SOLAS 8-person cannister life-rafts mounted on port/starboard push-pit cradles – Service due November 2026
EPIRB – Service / Battery replacement due 2030
Danbuoy – x2 Plastimo telescopic buoys with light
Horseshoe Lifebuoy – x2 with Apollo light
Lifejackets - 10 x SOLAS lifejackets, 8 fitted with AIS/MOB1 Spinlock elasticated safety tethers
Code 0 flares/LED distress flares
Helicopter strop
Jackstay lifelines
MCA category A medical kit
RIB medical kit and flares
CO and smoke alarms in all cabins/accommodation
50% storm boards for windows/portlights

DISCLAIMER
In this case we are acting as brokers only.

The Owner is not selling in the course of a business. whilst every care has been taken in their preparation, the correctness of these particulars is not guaranteed. The Purchaser is strongly advised to check the particulars and where appropriate at their expense to employ a qualified Marine Surveyor to carry out a survey and/or to have an engine trial conducted which if conducted by us shall not imply any liability for such engine on our part.

This vessel is offered subject to prior sale, price change, or withdrawal without notice.

Unless otherwise stated on the published sales specification the following presumptions are made:

Shaft seal or sail drive diaphragms are more than 5 years old.
Fuel, gas hoses and gas regulators are more than 5 years old.
The vessel doesn’t currently have a GasSafe certificate issued within the last 5 years.
Standing rigging and sails are more than 10 years old.